video1.0<iframe src="https://www.loom.com/embed/d56ef114745d4ab88046500806052c30" frameborder="0" width="2270" height="1702" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>17022270Loomhttps://www.loom.com17022270https://cdn.loom.com/sessions/thumbnails/d56ef114745d4ab88046500806052c30-00001.gif451概念 gàiniàn - concept概括 gàikuò - generalize, epitomize, sum-up概况 gàikuàng - general situation, a brief account大约 dàyuē&nbsp; -OR- 约 yuē - approximately (more formal)&nbsp;